<ul id="menu">
    	<li><a href="<?php echo base_url();?>">Trang chủ</a></li>
        <li><a href="<?php echo site_url('bang-gia');?>">Báo giá</a></li>
        <li><a href="<?php echo site_url('lien-he');?>">Liên hệ</a></li>
 </ul>